Drone-mounted gas detector

                                                                                                        UAV-mounted Gas Detector

Background Overview

With the increasingly severe air pollution in our country in recent years, the proportion of pollutants has become heavier, and consequently, the task of air pollution detection and control in China has become more arduous. The state has deployed and improved particulate matter and gas detection equipment in most cities, forming a ground-based pollution source detection network with dense distribution combining national control points and provincial control points.

However, we can also clearly see that there is still a large gap between the predictions made based on ground detection data from national control points and the development of actual environmental pollution conditions. In addition, the control measures implemented based on ground monitoring data, such as ground sprinkling, construction site covering, traffic restrictions, industrial production limits, boiler transformation, desulfurization and denitrification treatment, etc., have not yielded satisfactory results.

As the third-generation remote sensing technology following aerial and aerospace remote sensing, UAV (Unmanned Aerial Vehicle) remote sensing technology has advantages such as three-dimensional monitoring, fast response speed, wide monitoring range, and small terrain interference. It is one of the important development directions for identifying pollution sources and monitoring concentrations during future atmospheric emergencies.

However, due to the limited payload of UAVs, completing high-precision atmospheric environmental monitoring work requires high-precision sensor payloads. There are few traditional sensors available due to limitations in volume, weight, and other aspects. Therefore, our company has researched and developed small, lightweight sensor payloads suitable for UAV mounting to realize UAV air pollution monitoring and fixed pollutant detection by UAVs.

Features of UAV-mounted Gas Detector

● The software supports multiple UAV manufacturers, including all series from DJI

● Thousands of gas sensors can be replaced at any time, and the system features automatic gas type recognition

● Housing design is waterproof, windproof, dustproof, and impact-resistant

● Real-time display and transmission of monitoring data, generating corresponding trend curves

● Historical real-time data can be viewed, and curve analysis charts, lists, and chart styles are generated simultaneously to display historical data, facilitating comparative viewing

● Can display longitude, latitude, altitude, aircraft status, temperature, humidity, PM1, PM2.5, PM10, and real-time concentration values of thousands of gases

● Detection accuracy can reach ppb level

● Real-time wireless data transmission to the ground terminal, and also real-time transmission to the server via GPRS Overview

UAV Gas Detection Payload Parameters

● Applicable: Multi-rotor UAVs, Fixed-wing

● Detectable Gases: PM2.5, PM10, NO2, SO2, CO, O3, VOC, etc. (optional)

● Detection Principle: Electrochemical, Laser

● Weight: 1000 grams (7 parameters)

● Dimensions: 220×145×60mm

● Power Supply: 12-24V

● Data Transmission Mode: 4G/Wireless data transmission

● Operating Temperature: (-30~+60)℃

● Operating Humidity: (15 ~ 95)% RH, non-condensing

● Equipment Lifespan: More than 5 years (excluding consumables)

UAV Gas Detection Payload Dimension Diagram

The software of the ground receiving system is specially designed dedicated software for receiving, decoding, displaying, processing, and reporting the above-mentioned monitoring and detection data. It is separate from the flight control software and consists of two relatively independent software programs. When the UAV flies normally with our company's gas detection equipment, it can detect concentration values in real-time and transmit them back to the ground software for data analysis and display. It also supports synchronous data return and processing functions for multiple detectors.

The data analysis software platform mainly includes functions such as real-time data display, checking whether the detected environmental data status is normal, alarm value points, real-time data value change trends, as well as historical data query and export, which are synchronized on the ground receiving system.

(1) Real-time data display is shown in the figure below:

Data Display Monitoring Large Screen

The software platform can display corresponding detection data and change trends in real-time. It integrates air quality gas sensor data and toxic gas emergency monitoring data into a unified platform for unified management and comprehensive display. Gas sensor data uses different colors to represent different pollution levels.

(2) Historical data query is shown in the figure below:

Historical Data Query Interface

Simple statistical analysis is performed on historical monitoring data from various points, such as daily variation analysis and time series analysis, helping the purchaser save manual analysis time costs, while also helping the purchaser understand the basic pollution status.

Flight Cruise Diagram

Through the flight mission function, the Beisiyun monitoring platform can specifically display the flight route and real-time concentration display during the flight. It displays via real-time updates and pollution concentration levels, and is also compatible with synchronous gimbal display; achieving synchronous display of data and video.

1 System Structure and Working Principle

This system mainly consists of unmanned aerial vehicles, Beisian BSA/QT-UAV gas detectors, data transmission/GPRS, ground stations/servers, and data processing software. It is mainly used for detecting atmospheric air quality AQI and emergency detection of toxic and harmful gases, with an accuracy that can reach 1PPB. It changes the traditional fixed-point detection, making gas detection flexible, fast, accurate, and convenient.

2 Software Implementation of Gas Concentration Data Acquisition

There are tens of thousands of gas types, ranges, and accuracies in gas detection. In order to simplify user operation and costs, our company has specially designed a set of intelligent sensor series. It has a complete set of software information systems, effectively dividing all detectable gas types to achieve a fully intelligent recognition system. Customers can configure different sensors according to different detection scenarios; making UAV gas detection very flexible and unaffected by the payload.

Application Fields: Mounted on UAVs, automobiles, robot inspections, ships, etc.

1. Fire emergency monitoring and investigation of leakage sources

2. Pipeline leakage inspection

3. Air quality detection

4. Enterprise emission pollution detection

5. Monitoring of polluted gases around chemical, petroleum, and other enterprises

6. Monitoring of exhaust gas emissions from ships at ports and docks

7. Rapid environmental screening and locking

8. Robot safety inspection in specific areas and special warehouses